Pneumatic riveter.



No. 832,481. PATENTED 00T. 2, 1906. W. E. HUBBY.

PNBUMAT IVETER. v APPLIo-ATION P D SBPT.9.1905.

:wriiiau, s', t., Assio'Non or oNE-F WILLiAM E. unser, oi?

i To I nwiinn eut/:srieure., mi

. PNEUMAUC mori-TER 'Specification of Letters Patent.

A Piirmrr ortica. j

oURTH 'anw vomi, N. r1

Patented oct. 2, 1906.

Application tiled September 0,1905. Serial No. 277,711. l i

the following isa specification.

The invention is in. that class of rivetingmachines in which the button-set issubjected to the blows of a hammer-'or plunger reciprocated by' compressed air, and relates yparticularly to means lor preventing the accidental removal of the'button-set Afrom the (cylinder of the riveter.

'lhe object of the invention is to provide a lock which will engager the button-set and while permitting the required movements hold it reliably in place in the cylinder and allow it to be easily removed and another substituted when desired.

The invention consists in certain novel features and details of construction by which the above objects are attained, to be hereinafter described.

The accompanying drawings form a part of this specification and show a preferred form of the invention.

Figure 1 is a plan view of a riveter equipped with my invention. Fig. .2 is a longitudiwl section, partly in elevation, on a largerscale, showing the Aforward end of the riveter an! the* locking` means. Fig, 3 is a corresponding cross-section on the line 3 3 in Fig. 2. l

Similar letters of reference indicate the same parts in all the figures where they appear.

A is the cylinder of a riveter, which may be of any ordinary or approved type, having a handle A', air-inlet A?, and push-button A3, controllingr the admission of air to the valves and cylinder, all ol" which may be as usual, and having a hammer B, adapted to be reciprocated in the cylinder and deliver its blows upon a button-'set C. 'lhe latter has the usual head, in which isa hemispherical cavity for shaping the button on a rivet, and a body C of smaller diameter matching'the bore of the cylinder A and received therein.

It is obviously necessary to provide means which while allowing the button-set to move axially to a limited evtent and also to revolve in the cylinder will hohl Ait engaged. with the latter and prevent its accidental escape and possible losstherefrom.v 'lhef loch employed is in the l'orm ol a leven lyingl in a longitudinal slot u, in the cylinder, tul-v crumed on a pin A", extending transversely l of the slot, and havingl an arm l)l2 extending outside the cylinder lsufliciently to permitl the lock to be turned thereby. A nose D projectsinwardly l'rom vthe lock at approxi.-y v

mately a right angle thereto and inthe closed position lies in an annular `L'roove c, provided in the body C ol the button-set between the shoulders or offsets Cl C, and by thus' en. gag-ingr the button-set prevents its removal from the 'cylinder until the locking-lever is raised and the fzose D withdrawn from the interior of the cylinder and out oiE the groove c. 'lhe lock is held closed by a spring-lateli com- -prising` a bolt E, lying in a hole a', drilled in the metal of the cylinder, acted upon by a springl Ebehind it tending to thrust the bolt forward, the movement being limited by a screw A5 set in the cylinder and projecting into -a groove in the bolt. The forward end of the bolt is rounded and is received -in a correspondingly-shaped recess or cavity formed in a plane portion D3 of the loc'kinef-l'ever` at the liunction therewith of the arm zly. rl`he bolt automatically engages the cavity and holds the lock closed; but the latter may be easily-released by the: application of suflicient force beneath the arm D2. Thus conditioned the button-set may move the len rth s `the point of contact shall be near the end of the nose, so that the impact shall tend by reason of the leverageto hold the lock in the closed position.

The main portion of the back of the lock lies parallel with the surface ot' the cylinder and ilush with or a little below such surface and is provided with a shoulder D4, arran ed to strike the end A5 ofthe slot a, and t us limit the movement of the lock in the act of opening, as shown in dotted lines vin Fig. 2, in which ostion the nose is wholly withdrawn an the button-set releasel.

A s the lock in the closed con( itionrojects but little and at one point only', it oes IOO ` not interfere with tnewesnroning or opera-v tion ofthe riveter in'onfin'ed situations and y is not likely tio be incidentally released.

The inventionmybe applied to any of the ordinary 'formar of rivetersav the only .changes required being -tlieffjlrdllingand drilling lo erations lnecessary'-to permit the introductionv of the lock ardits latch and the production of the shallow'groove in the body 4of the' button-set.4

'Modifications may be made in the forms andv report-ions of' the parts' ande the latter may e diferently lbcat'ed. means mayfbel substitutedbY for the late Shown.'` j I I' claim- 1%: vIn' a riveter having a cylinder, alb'clth ingdever operated fromtheexterior of' said c llnder vand extending into the4v interior t ereof, a lockingl device for saidl levermounted Within the walll of saidff cylinder, and a button-setloosely mounted-insaid cylinder and'const-ructed' t'o be engaged by said locking-lever.- l

2.Y In a riveter, a lock in the form. of a lever pivotally mounted-inthe wall ofthefcylnder,

` the orni offa lever pivotallv mounted in the wall" offsaid cylinder, aA button-set having'an @ther holdin annular groove, a noseon said lock arranged to project Within said c linder and into said groove, and means con ned Within the wall of said cylinder for engaging said lever and holding it in the engagedvcondition 4'. In-` ariveter having a cylinder, a lock in the form of a leverpivotally mounted in the.

wall of said cylinder and lying in a slotin. the

latter, an arrn onl said lock projectingexteriorly of said' cylinder, a nose on said lock lprojecting interiorly of said cylinder, a but- I ton-set loosely mounted in said cylinder'and` j having an annular groove arrangedto receive l said nose-,fand a spring-latch arranged tlc hol'flsaid lockinzengagement' with said roovel 5. In a riveter having a cylinder, a oclity in the form of'a lever pivotally mounted* in the i I -wall of said cylinder, a nose on said' lever proje'cting interiorly of said cylinder, a buttonset loosely mountedin said cylinder andv hav- -in'g'an annulargroove arranged to receive said nose, anda shoulder onsaid-button-set arranged to Contact with said' nose and-lockin means mounted within thewall of the cy inder to engave said lever near its free end and hold said lever-in the 'engaged posi.- 1

tion.

In testimony that I claim the inventionl above set forth I ai'x 'my signature1 in pmsence of twotwibnesses.

WILLIAM E. HUBBK Witnesses: i'

JACOB C. SIRF-ERT, CLAUDA CoLuGNoN. 

